JP2009234342A - Fog suppression mechanism control method and fog suppression mechanism control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain an output result as intended by an optional input value in fog suppression mechanism control. <P>SOLUTION: An external temperature ξ, an internal temperature η and in-cabin humidity β are made to input parameters and fog generation possibility to a vehicle window glass is made to an output parameter α, and model control pattern for determining a relationship of values of β and α is prepared in each model coordinate point of Q number (Q≥4) on a partial input plane tensioned with ξ, η. When respective input values of ζ, η, β are given, coordinate points on the partial input plane of ξ, η included in the input value are actual control coordinate points px and model coordinate points of J number (Q>J≥3) or more positioned at a morphing object area DT including the actual control coordinate point px at the inside are predetermined as coordinate points pa, pb, pc to be morphed in the partial input space. The shape of the model control pattern of J number corresponding to the coordinate points pa, pb, pc to be morphed is morphed by weight corresponding to a distance to the actual control coordinate point px of the respective coordinate points pa, pb, pc to be morphed on the partial input plane to obtain a synthetic control pattern Px. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fog suppression mechanism control method and a fog suppression mechanism control apparatus.

JP-A-8-238927 IEEE Computer Graphics and Applications, January / February 1998, 60-73

  Patent Document 1 discloses a method for preventing fogging of automobile window glass. The control system is responsive to signals generated by various climate control sensors, including humidity sensors, to generate the desired vehicle air temperature and airflow to detect and avoid the initial fog conditions on the windshield. The fog suppression mechanism is operated by fuzzy control.

  However, in fuzzy control, a membership function that defines the relationship between the actuator control position of the anti-fogging mechanism and the relative humidity in the room must be defined, and considerable effort is required for its design. It takes time to develop the control logic used.

  The object of the present invention is to provide a model control pattern that can be easily acquired in the fog suppression mechanism control in the form of multiple inputs and one output. An object of the present invention is to provide a fog suppression mechanism control method capable of obtaining a result, and a fog suppression mechanism control apparatus for realizing the same.

Means for Solving the Problems and Effects of the Invention

In order to solve the above problem, the fog suppression mechanism control method of the present invention is:
The possibility of fogging on the vehicle window glass with reference to a group of essential input variables including the window glass temperature ξ, the vehicle interior temperature η and the vehicle interior humidity β reflecting the surface temperature of the vehicle window glass on the fog generation side (vehicle interior side) Is a method of calculating the value of the output variable α indicating the following, and controlling the operation of the fogging suppression mechanism of the window glass based on the obtained output variable value α,
The essential input variable group is predetermined on the partial input plane on which the first type input variables ξ and η are stretched, with the window glass temperature ξ and the vehicle interior temperature η as the first type input variable, and the vehicle interior humidity β as the second type input variable. A plurality of discrete model control patterns that define the relationship between the value of the two input variables β and the value of the output variable α are prepared for each of the Q model coordinate points (Q ≧ 4),
When each input value of the essential input variable group ξ, η, β is given, the coordinate point on the partial input plane of the first type input variable ξ, η included in the input value is used as the actual control coordinate point, and the part Identifying J (Q> J ≧ 3) or more model coordinate points existing in a predetermined morphing target area including the actual control coordinate point inside the input plane as morphing coordinate points;
In the control pattern plane spanned by the second type input variable β and the output variable α, the shape of the J model control patterns corresponding to each morphed coordinate point is the actual control coordinate point of each morphed coordinate point in the partial input plane. Create a composite control pattern corresponding to the actual control coordinate point by morphing with a weight according to the distance to
Based on the composite control pattern, an output variable value α indicating the degree of occurrence of fogging corresponding to the input values of the essential input variable groups ξ, η, β is calculated.

Further, the fog suppression mechanism control device of the present invention is
With reference to the essential input variable group including the window glass temperature ξ, the vehicle interior temperature η and the vehicle interior humidity β reflecting the surface temperature on the fog generation side of the vehicle window glass, an output variable α indicating the possibility of fog generation on the vehicle window glass Is a device that controls the operation of the fogging suppression mechanism of the window glass based on the obtained output variable value α,
The essential input variable group is predetermined on the partial input plane on which the first type input variables ξ and η are stretched, with the window glass temperature ξ and the vehicle interior temperature η as the first type input variable, and the vehicle interior humidity β as the second type input variable. Control characteristic information for storing a plurality of model control patterns that define the relationship between the value of the two-type input variable β and the value of the output variable α, which are discretely prepared for each of the Q model coordinate points (Q ≧ 4) Storage means;
When each input value of the essential input variable group ξ, η, β is given, the coordinate point on the partial input plane of the first type input variable ξ, η included in the input value is used as the actual control coordinate point, and the part Morphed coordinate point specifying means for specifying, as the morphed coordinate points, J (Q> J ≧ 3) or more model coordinate points existing in a predetermined morphing target area including the actual control coordinate points on the input plane. When,
In the control pattern plane spanned by the second type input variable β and the output variable α, the shape of the J model control patterns corresponding to each morphed coordinate point is the actual control coordinate point of each morphed coordinate point in the partial input plane. Control pattern morphing means for performing a composite control pattern corresponding to the actual control coordinate point by morphing with a weight according to the distance to
Output variable calculation means for calculating an output variable value α indicating the degree of occurrence of fogging corresponding to the input values of the essential input variable groups ξ, η, β based on the synthesis control pattern. .

  In the present invention, the essential input variable group used for the operation control of the vehicle window glass fog suppression mechanism includes at least the window glass temperature ξ, the vehicle interior temperature η, and the vehicle interior humidity β. A second type input variable (in-vehicle humidity β) that directly describes the relationship with the model control pattern as a model control pattern, and a first type input variable (window glass temperature ξ and vehicle interior) for mapping the model control pattern Temperature η). A plane formed by the first type input variables ξ and η is defined as a partial input plane (that is, ξ−η plane). Further, a space between the second type input variable β and the output variable α is defined as a control pattern plane.

  Then, two or more model coordinate points are defined on the partial input plane (ξ−η plane) for various combinations of the first type input variables ξ and η, and each model coordinate point is unique (that is, the first A model control pattern (which reflects a preferable control characteristic between the second type input variable β and the output variable α) is prepared for each combination of the individual values of the one type input variables ξ and η. When the current values of the essential input variable groups ξ, η, β are acquired, if the values of the first type input variables ξ, η included therein are extracted, the coordinate points on the partial input plane are actually controlled coordinates. Can be plotted as points. Then, three or more model coordinate points existing in a predetermined morphing target area including the actual control coordinate points are specified as morphing coordinate points.

  The actual control coordinate points representing the current values of the first type input variables ξ and η change every moment, and in general, this rarely coincides with any model coordinate point. Therefore, a plurality of model coordinate points close to the actual control coordinate point are selected as the morphed coordinate points (the specific selection method varies depending on how the morphing target area is set). Each model coordinate point has a unique model control pattern. For each model control pattern, when the value of the first type input variable among the required input variable group is fixed to the coordinate value of the model coordinate point, how the output variable is set according to the value of the remaining second type input variable Although it is a control function that describes whether to change, when viewed on the control pattern plane, it can be understood as a figure having a unique shape for each model coordinate point.

  The inventor conceptually converts a control pattern (control function) into a figure and captures it, and conventionally morphing (for example, Non-Patent Document 1) specialized in the image processing field is intentionally introduced into the field of air conditioner control. As a result, it has been found that control patterns that are not originally prepared for actual control coordinate points can be easily obtained, and the present invention has been completed. That is, actual control of each morphed coordinate point on the partial input plane by regarding each model control pattern prepared corresponding to multiple morphed coordinate points on the partial input plane as a figure on the control pattern plane. Morphing can be performed in the same manner as in the case of image synthesis processing with a weight according to the distance to the coordinate point. Conventionally, the purpose was only to visually output an image synthesized by morphing. However, in the present invention, a control pattern is synthesized by morphing, and a synthesis control pattern that is a result of morphing. As a control function for determining the value of the output variable α when the second type input variable β is given, the greatest feature is that it is secondarily used for operation control of the fogging suppression mechanism of the window glass.

  The composite control pattern corresponding to the actual control coordinate point obtained by morphing is not only contradictory in terms of control technology, even though it is obtained by a pure image composition processing method. Individual model control patterns are prepared to reflect appropriate control characteristics between the second type input variable β and the output variable α for each type of input variable ξ, η (coordinate value of model coordinate point) As long as this is done, the composite control pattern can also be obtained as a precise reflection of the desired control characteristic at the actual control coordinate point. In spite of the control of the multi-input one-output mode, the main factor of the development man-hour is the second set of various types of input variables ξ and η (coordinate values of model coordinate points). It is only mechanically repeating a process of acquiring a model control pattern indicating the relationship between the seed input variable β and the output variable α by, for example, an experimental method. The obtained model control pattern can be immediately put into actual use just by installing it on the device, and the output result as intended can be obtained for any input value by an image synthesis algorithm that uses morphing and has few development steps. The resulting anti-fogging mechanism control method and apparatus are realized.

  A problem that occurs during operation of the vehicle (automobile) is, for example, fog generated in a front glass for visually recognizing the front side in the traveling direction or a rear window for visually recognizing the rear side. In addition, in order to ensure the visibility of the side of the vehicle and the side mirror, suppression of fogging of the side window can also be considered. Although fogging may occur on the outside of the glass wheel due to night condensation or the like, the object of suppression in the present invention is fogging generated on the inner surface (vehicle inner side) of the window glass. Humidity tends to be high in the passenger compartment due to the sweating and exhalation of passengers, and on the other hand, the temperature tends to rise in winter due to the heating operation (especially when there are many passengers, this tendency is promoted). ) When the air conditioner is used, dehumidification proceeds due to the operation of the refrigerator (evaporator). However, if the outside temperature is low, the amount of water vapor in the vehicle is outside the vehicle even if the inside of the vehicle is dehumidified to a relative humidity (eg, about 50% RH) that does not cause discomfort It may greatly exceed the amount of saturated water vapor at temperature. Then, in the vicinity of the window glass cooled to near the outside air temperature, the air inside the vehicle having a high water vapor amount is locally cooled to fall below the dew point, and condensation occurs on the inner surface of the window glass to cause fogging.

As a fog suppression mechanism for suppressing this fogging, the following mechanism of an air conditioner mounted on a vehicle can be used.
(1) Air outlet switching mechanism The air in the laminar flow region near the inner surface of the window glass is not easily affected by convection in the vehicle, and cooling by the window glass proceeds to increase the relative humidity and cause dew condensation. Therefore, if the airflow outlet of the air conditioner is switched to the direction along the inner surface of the window glass, the thickness of the laminar flow region is reduced by the convection effect, and condensation can be removed. Specifically, a mechanism for switching the blower outlet switching damper position of the air conditioner to the differential blower outlet side that blows upward from the lower end of the inner surface of the front glass can be employed, thereby suppressing fogging of the inner surface of the front glass. In addition, in the case of a vehicle having a side differential outlet in the vicinity of the right and left side windows of the instrument panel and a vehicle having a rear differential outlet exclusively for the rear window, a mechanism for switching to the side differential outlet can be used. It is also effective to cause the louver to face the side window.

(2) Inside / outside air switching mechanism An inside / outside air switching damper switches between an inside air suction port for circulating the inside air and an outside air suction port for taking air outside the vehicle. When the temperature outside the vehicle is low, the amount of saturated water vapor is low even when the relative humidity is relatively high, so that the outside air can be used as dry air that helps to prevent fogging compared to a warmed vehicle interior. When fog occurs in the in-vehicle air circulation mode, the fog can be suppressed by switching to the outside air intake mode.

  Moreover, raising the blowing temperature of the conditioned air and raising the glass temperature may contribute to the suppression of fogging. However, excessively raising the blowout temperature causes discomfort due to heat, and the amount of saturated water vapor increases as the vehicle interior temperature rises. Care should be taken because the increase in the amount may cause overcasting. For example, it is effective to temporarily raise the temperature of the conditioned air when the differential outlet is used, from the viewpoint of quickly removing the fog.

Moreover, the following can be considered as a fog suppression mechanism other than the air conditioner.
(3) Energization heating type fog suppression mechanism A heating element (for example, a heating wire or a heating pattern) embedded (or surface-mounted) in a window glass is energized to generate heat to raise the glass temperature to remove or suppress fogging. It is known as a rear defroster mechanism provided in the rear window.
(4) Power window The power window mechanism automatically opens a certain amount of side windows and releases the humidity inside the vehicle all at once. it can.
In addition, the above fog suppression mechanism can also be used in combination of a some thing suitably according to the grade of fog generation | occurrence | production.

  Further, as a means for detecting the window glass temperature, a window glass temperature sensor such as a resistance type temperature sensor embedded in or mounted on the glass may be used, and it is considered that the glass temperature is approximately equal to the outside air temperature. The outside air temperature detected by the outside air temperature sensor can be substituted for the window glass temperature.

  Even if the amount of water vapor in the passenger compartment becomes considerably high, fogging does not occur on the inner surface of the glass unless the temperature of the window glass is below the dew point. On the other hand, even if the window glass temperature is considerably low, if the amount of water vapor in the passenger compartment air does not reach the amount of saturated water vapor at the window glass temperature, fogging does not occur on the glass inner surface. Therefore, when the window glass temperature and the vehicle interior temperature are determined, the vehicle interior humidity has a cloudy critical humidity value that gives the saturated water vapor amount at the window glass temperature. Whether or not fogging occurs on the inner surface of the window glass (that is, the fogging possibility α) tends to change abruptly depending on whether or not the in-vehicle temperature exceeds the critical humidity value. Therefore, the model control pattern and the composite control pattern are a critical pattern in which the in-vehicle humidity β is predetermined on the control pattern plane in which the in-vehicle humidity β forming the second type input variable and the fog generation possibility α forming the output variable are stretched. It is defined as a two-dimensional diagram pattern with a pattern profile in which the degree of cloudiness occurrence α increases stepwise as it moves from a low humidity value interval that is less than the humidity value to a high humidity value interval that exceeds the critical humidity value. be able to.

  In this way, in the model control pattern data acquisition process, the set of first type input variables ξ and η is fixed to an arbitrary value, and the output of one second type input variable β is simply changed. It is simplified in the form of finding the appropriate value of the variable value α, which contributes to further reduction in development man-hours, and the morphing calculation algorithm can be reduced in weight because synthesis of the diagram pattern is sufficient. Each model control pattern can be defined such that the critical humidity value decreases as the glass surface temperature ξ decreases and as the vehicle interior temperature η increases.

  The above two-dimensional diagram pattern can be defined by a certain number of handling points arranged from the pattern start point to the pattern end point, and each handling point of the two-dimensional diagram pattern corresponding to all model coordinate points They can be uniquely associated according to the order of arrangement. Then, a composite handling point is generated by morphing corresponding ones of the handling points of the two-dimensional diagram pattern applied to each morphing coordinate point, and a two-dimensional diagram pattern forming a composite control pattern by the composite handling points Can be defined. By reducing the two-dimensional diagram pattern to a set of handling points, the morphing calculation target can be limited to a limited number of handling points, and the morphing calculation load can be greatly reduced. The synthesis control pattern can also be easily obtained from the synthesis handling points obtained as a result of morphing.

  The type of the two-dimensional diagram pattern defined by the handling points can be, for example, a curve pattern such as a Pezier curve or a B-spline curve, but can be a polygonal line pattern obtained by sequentially connecting the handling points in a straight line. It can contribute by simplification of operation. In addition, in the two-dimensional diagram pattern representing the control pattern, when it is desired to control the change gradient of the output variable with respect to the second type input variable discontinuously at the inflection point, the handling point representing the inflection point is Even after morphing synthesis, since it is stored as a handling point that represents the corresponding inflection point in the composition control pattern, a plurality of two-dimensional diagram patterns with different inflection point positions are geometrically blended. The bending point position can be prevented from becoming unclear.

  Next, in order to determine the morphing coordinate point easily and accurately, the morphing algorithm can be simplified by setting the morphing target area as follows. That is, by adjoining model coordinate points in the partial input plane to each other, a plurality of unit cells are arranged so as to divide the partial input plane without gaps, with each vertex being a model coordinate point. Among the plurality of unit cells, the one containing the actual control coordinate point is used as a morphing target region, and the model coordinate point forming the vertex of the unit cell is used as the morphing coordinate point. By dividing the partial input plane in advance with unit cells (morphing target areas) as described above, by determining which unit cell the actual control coordinate point belongs to, model coordinates that form the vertex of the unit cell A point can be easily determined as a morphed coordinate point.

  The minimum value of the number of vertices of a unit cell obtained by frame-linking model coordinate points dispersed in the partial input plane is 3, and the unit cell (referred to as simplex) is a triangle. Such a triangle is called Delaunay triangle. By using such Delaunay triangle as a unit cell, it is possible to obtain a composite control pattern by morphing the minimum number of model control patterns using the model coordinate points closest to the actual control coordinate points. , Process simplification can be measured.

  On the other hand, as the unit cell, the unit cell can be selected as a rectangular cell in which each coordinate axis extending on the partial input plane and each side are defined in parallel. The rectangular cell is a redundant vertex unit cell having a larger number of vertices than the Delaunay triangle that is a simplex, and by adopting this, the number of model control patterns involved in the creation of the synthesis control pattern is increased (redundancy). It is possible to increase the validity of the control content at the actual control coordinate points according to the composite control pattern.

  In addition, if all vertices of redundant vertex unit cells, that is, model coordinate points are set at random, there are two coordinate components per model coordinate point. Number) coordinate values must be considered as independent variables. However, if a rectangular cell as described above is adopted, if the length of each side of the rectangular cell (two types) is given, from the coordinates of one model coordinate point forming the vertex of the rectangular cell, other model coordinate points The coordinates of can be automatically determined. Therefore, the number of independent variables to be considered in the calculation is 2 (the number of coordinate components) +2 (the length of each side of the rectangular cell) = 4, which is calculated in comparison with the case where all model coordinate points are set at random. Can be greatly simplified. In particular, if a plurality of rectangular cells forming redundant vertex unit cells are determined to be congruent with each other, the length of each side of the rectangular cell can be made constant, so in the calculation, the coordinates of one model coordinate point are used. Only the components need to be handled as variables, and the number of independent variables to be considered in the calculation is only four, so that the calculation can be further simplified.

  Based on the geometric relationship between the model coordinate points that form the vertices of the rectangular cells and the actual control coordinate points, when a model control pattern corresponding to each model coordinate point is linearly interpolated to obtain a composite control pattern, By adopting the following method, the morphing algorithm can be greatly simplified. That is, it cuts in two planes parallel to each side through the actual control coordinate point of the rectangular cell. As a result, each rectangular cell is divided into four partial rectangles that share the actual control coordinate points and exclusively take one model coordinate point forming the vertex of the rectangular cell.

  Morphing is performed in such a manner that the relative volume of each partial rectangle with respect to the rectangular cell is used as a weight to the model coordinate point located on the opposite side of the rectangular cell in the diagonal direction of the model coordinate point included in the partial rectangle. According to this method, the morphing weight calculation can be converted into the volume calculation of each partial rectangle. For example, the final synthesis control pattern can be obtained by repeating model control pattern synthesis by linear interpolation between two points relatively few times. Can be easily obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram schematically showing the overall configuration of an air conditioner control apparatus CA that can operate as a window glass fog suppression mechanism control apparatus according to the present invention. The air conditioner control apparatus CA includes a duct 1, in which an inside air suction port 13 for circulating the air inside the vehicle and an outside air suction port 14 for taking in air outside the vehicle are formed by an inside / outside air switching damper 15. Either one is used for switching. Air from the inside air inlet 13 or the outside air inlet 14 is sucked into the duct 1 by a blower 16 driven by a blower motor 23.

  In the duct 1, there are an evaporator 17 for cooling the sucked air to generate cool air, and a heater core 2 (heating operation by waste heat of engine cooling water) that heats this to generate warm air. Is provided. And these cold air and warm air are mixed in the ratio corresponding to the angular position of the air mix damper 3, and are blown out from the blower outlets 4, 5, and 6. Of these, the windshield defogging outlet 4 is installed at the upper rear of the instrument panel corresponding to the lower edge of the inner surface of the front glass, the face outlet 5 is located at the center of the front of the instrument panel, and the foot outlet 6 is installed at the inner bottom of the instrument panel. It opens at a position facing the person's feet, and is individually opened and closed by the blower outlet switching dampers 7, 8, 9. Specifically, according to the rotational input phase for damper control from the motor 20, only the face air outlet 5 and the face air outlet 5 and the foot air outlet 6 are opened by the damper drive gear mechanism 10. The state is switched between a state where only the foot outlet 6 is opened, a state where the foot outlet 6 and the differential outlet 4 are opened, and a state where only the differential outlet 4 is opened.

  The inside / outside air switching damper 15 is electrically driven by a motor 21, the air mix damper 3 is electrically driven by a motor 19, and the outlet switching dampers 7, 8, 9 are electrically driven by a motor 20. These motors 19, 20, and 21 are constituted by, for example, stepping motors, and the individual operations are centrally controlled by an air conditioner ECU 170 that forms the main body of the air conditioner drive control means. Further, the blower motor 23 is constituted by a brushless motor or the like, and the air flow rate is adjusted by the air conditioner ECU 170 by controlling the rotation speed by PWM control. The substance of the air conditioner ECU 170 is computer hardware, to which an evaporator sensor 51, an inside air sensor 55, an outside air sensor 56, a water temperature sensor 57, a solar radiation sensor 58, and an in-vehicle humidity sensor 61 are connected. The inside air sensor is for measuring the air temperature inside the vehicle, and the outside air sensor 56 is for measuring the air temperature outside the vehicle. The outside air temperature detected by the outside air sensor 56 is used as the glass surface temperature ξ (hereinafter also referred to as “outside air temperature ξ”). The solar radiation sensor 58 is for measuring the temperature inside the vehicle, and the humidity sensor 61 is for measuring the humidity inside the vehicle.

  The in-vehicle air conditioner operation unit 100 also has an independent operation unit ECU 160, and has an air volume setting switch 52, an air outlet changeover switch 53, a temperature setting switch 54, an A / C switch 59, an auto changeover switch 103, and an inside / outside air changeover switch 60. Is connected. The operation unit ECU 160 is connected to the air conditioner ECU 170 via a communication bus 30 (for example, a serial communication bus such as a LIN communication bus). The communication bus 30 is also connected with a rear defroster mechanism 25 including an energized heat generation pattern 24p and a driver 24 thereof.

  The operation unit ECU 160 is also computer hardware, and is connected to the above-described air volume setting switch 52, air outlet changeover switch 53, temperature setting switches 54D and 54P, A / C switch 59, auto changeover switch 103, and inside / outside air changeover switch 60. Yes. The operation input states of the air volume setting switch 52, the air outlet changeover switch 53, the temperature setting switches 54D and 54P, the A / C switch 59, the auto changeover switch 103 or the inside / outside air changeover switch 60 are transmitted from the operation unit ECU 160 via the communication bus 30. To the air conditioner ECU 170.

Specifically, the air conditioner ECU 170 performs the following control in cooperation with the operation unit ECU 160 by executing an air conditioner control firmware mounted in a built-in ROM or the like.
In response to the operation input state of the inside / outside air changeover switch 60, a control command is issued to the drive IC of the corresponding motor 21 so that the inside / outside air switching damper 15 is tilted to either the inside air side or the outside air side.
The operation of the evaporator 17 is turned on / off according to the operation state of the A / C switch 59.

Based on the input state of the auto changeover switch 103, the operation mode of the air conditioner is switched between the manual mode and the auto mode.
In the auto mode, reference is made to the input information of the set temperature by the temperature setting switches 54D and 54P and the output information of the inside air sensor 55, the outside air sensor 56, the water temperature sensor 57, the solar radiation sensor 58 and the inside humidity sensor 61, and the inside temperature is Corresponding motors 19, so that the blowout temperature adjustment by adjusting the opening degree of the air mix damper 3, the air volume adjustment by the blower motor 23, and the position change of the blowout outlet switching dampers 7, 8, 9 are made to approach the set temperature. The operation control commands 23 and 20 are performed.
In the manual mode, air volume adjustment by the blower motor 23 is performed in response to operation input states of the air volume setting switch 52 and the air outlet changeover switch 53, and the air outlet change dampers 7, 8, 9 are in corresponding open / closed states. Thus, a drive control command to the motor 20 is performed.

  When the air conditioner control device CA functions as a suppression mechanism control device, the air conditioner control device CA calculates the value of the output variable α indicating the degree of fogging on the window glass, and the window glass based on the obtained output variable value α. It controls the operation of the fog prevention mechanism. In this embodiment, the fog prevention mechanism is an air conditioner air outlet switching mechanism using the air outlet switching dampers 7, 8, 9 (which may be a mode switching from a mode not including the air outlet from the differential air outlet 4 to a mode including the air outlet). The rear defroster mechanism 25 is used.

The above-described firmware implements the following function implementation means by computer processing.
Control characteristic information storage means: generation of fogging on output variables (window glass (specifically, front glass and rear window)) according to the values of essential input variable groups (external temperature ξ, in-vehicle temperature η, and in-vehicle humidity β) As control characteristic information for determining the value of the possibility α), a predetermined input on a partial input plane MPS (here, ξ-η plane) spanned by a first type input variable ((outside temperature ξ, inside temperature η)) A second type input variable (inside the vehicle) prepared in a plurality of discrete manners for each of Q (Q ≧ 4: as shown in FIG. 3A, Q = 30 in this embodiment) for each model coordinate point p A model control pattern P (FIG. 3A) that defines the relationship between the value of humidity β) and the value of the output variable (fogging occurrence probability α =) is stored, which corresponds to the control data memory 171 in FIG.

-Morphed coordinate point specifying means: When a three-dimensional input value px of an essential input variable group (vehicle outside temperature ξ, vehicle interior temperature η, and vehicle interior humidity β) is given, it is included in the input value px as shown in FIG. A coordinate point on the partial input plane MPS (ξ-η plane) of the first type input variable (vehicle outside temperature ξ, vehicle interior temperature η) is defined as an actual control coordinate point px on the partial input plane MPS (ξ-η plane). J model coordinates points (Q> J ≧ 3: where J = 3 and the morphing target area DT is a Delaunay triangle) existing in a predetermined morphing target area DT including the actual control coordinate point px p is identified as a morphed coordinate point pa, pb, pc.
Control pattern morphing means: each morphing coordinate point pa on a control pattern plane CPS (here, β-α plane) spanned by a second type input variable (in-vehicle humidity β) and an output variable (fogging probability α) , Pb, pc corresponding to the shape of the J model control patterns Pa, Pb, Pc up to the actual control coordinate point px of each morphed coordinate point pa, pb, pc in the partial input plane MPS (ξ-η plane) The composite control pattern Px corresponding to the actual control coordinate point px is created by morphing with a weight according to the distance.
Output variable calculation means: Calculates the value of the output variable (fogging possibility α) corresponding to the second type input variable (in-vehicle humidity β) based on the composite control pattern Px.

  Hereinafter, the operation of the air conditioner control device CA when functioning as the fog suppression mechanism control device will be described in more detail. As shown in FIG. 2, the air conditioner ECU 170 detects the three sensors of FIG. 1, that is, the outside air sensor 56, the inside air sensor 55, and the inside humidity sensor 61 in order to calculate the set value of the fog occurrence possibility α that is an output variable. Read the value. The detection value of the outside air sensor 56 is acquired as the outside temperature ξ, and the detection value of the inside air sensor 55 is acquired as the inside temperature η. Further, the detection value of the in-vehicle humidity sensor 61 is acquired as the in-vehicle humidity β.

  The set of the acquired outside temperature ξ and inside temperature η indicates the actual control coordinate point px on the partial input plane MPS (ξ−η plane). On the other hand, a set of various values of the vehicle outside temperature ξ and the vehicle interior temperature η (first type input variable) is defined as model coordinate points p. As shown in FIG. A model control pattern Pi (≡P1 to P30) is stored for each coordinate point pi (ξi, ηi).

  As shown in FIG. 4, each model control pattern Pi (≡ P1 to P30: FIG. 5) has a control pattern plane CPS in which the in-vehicle humidity β (second type input variable) and the fogging possibility α (output variable) are stretched. It is a two-dimensional diagram pattern that can be drawn on the (β-α plane). The control pattern Pi has a fogging possibility degree α as the vehicle interior humidity β shifts from a low humidity value section SL where the vehicle interior humidity β is less than a predetermined critical humidity value βc to a high humidity value section SH exceeding the critical humidity value βc. Has a pattern profile that increases stepwise. In the low humidity value section SL, the fogging possibility α is determined to be, for example, 0% (that is, there is no possibility of fogging), and in the high humidity value section SL, the fogging possibility α is, for example, 100% (that is, it is always fogging). ). Further, in the intermediate humidity value section including the critical humidity value βc, the fogging possibility α is gradually increased from the low humidity value section SL side to the high humidity value section SL side. In this section, it means that there is both the possibility of fogging and the possibility of no fogging due to uneven glass temperature and humidity distribution inside the vehicle. Here, the critical humidity value βc is defined as a humidity value forming the center of the intermediate humidity value section.

  The air conditioner ECU 170 in FIG. 1 defines the fog suppression mechanism between the operating state and the non-operating state as follows depending on whether the fogging possibility degree α is less than or exceeds the threshold value αc corresponding to the critical humidity value βc. Switch. That is, when the fogging possibility degree α is less than the threshold value αc during the heating operation, the air conditioner ECU 170 causes the air outlet switching dampers 7, 8, and 9 to open the face air outlet 5 alone or the face air outlet 5 and the foot. The air outlet 6 is opened. Further, the rear defroster 25 is in a non-energized state (the non-operating state of the fog suppression mechanism). On the other hand, if the fogging possibility α exceeds the threshold value αc, the air conditioner ECU 170 opens the outlet switching dampers 7, 8, 9, with the foot outlet 6 and the differential outlet 4 open, or only the differential outlet 4. Is switched to one of the open states, and the rear defroster 25 is energized (the operation state of the fog suppression mechanism).

  As shown in FIG. 5, each model control pattern for determining the fog occurrence possibility α has a certain number (nine in the figure) of handling points hi arranged from the starting point to the ending point. It is defined as a polygonal line pattern obtained by sequentially connecting points hi. Therefore, the control pattern P can be uniquely defined as a set of coordinate values of the handling points hi on the β-α plane, and the handling points h of the model control patterns Pi are uniquely defined according to the arrangement order. A common correspondence.

  As shown in FIG. 6, the partial input plane MPS (ξ−η plane) in which the outside temperature ξ and the inside temperature η, which are first type input variables, are stretched with Delaunay triangles (simplex) with each model coordinate point as a vertex. ) Are divided without gaps. A specific control flow using the Delaunay triangle is shown in the flowchart of FIG. First, the unit cell DT to which the actual control coordinate point px having the set of the acquired outside temperature ξ and inside temperature η as a coordinate component belongs is specified (S1). Then, three model coordinate points forming each vertex of the specified unit cell DT are selected as the morphing coordinate points pa, pb, pc (S2).

  Then, as shown in FIG. 6, three model control patterns Pa, Pb, Pc corresponding to the morphed coordinate points pa, pb, pc are read from the control data memory 170 (S3), and the partial input plane MPS (ξ− The composite control pattern Px corresponding to the actual control coordinate point px is created by morphing with a weight corresponding to the distance to the actual control coordinate point px of each morphed coordinate point pa, pb, pc in the η plane) ( S4). This calculation is performed by the morphing calculation unit 172 of FIG.

  FIG. 7 conceptually shows a polymorphing algorithm using Delaunay triangles in the control pattern. Here, a case where three control pattern figures P0, P1, and P2 corresponding to the Delaunay triangle vertices are combined is taken as an example, and Wij is a warp function from Pi to Pj, on Pj corresponding to each point on Pi. Identify the points. In order to generate the synthesis control pattern P, first, Wij is applied to the barycentric coordinates gj of Pj, and Wij is linearly interpolated for each Pi to derive an intermediate warp function Wibar. Two adjacent Pis are intermediately synthesized with a weight corresponding to the px center-of-gravity coordinate G * of the actual control coordinate point by the Wi bar to generate an intermediate control pattern Pi bar. The synthesis control pattern Px is obtained by linearly combining each point (specifically, each handling point) of the Pi bar with a weight indicated by the barycentric coordinates gj.

  FIG. 8 shows this in a more concrete manner. In the ξ-η plane, the morphing coordinate points pa, pb, pc are points A, B, C, respectively, and the actual control coordinates. Let the point px be the point X. Considering a straight line that intersects each side from the vertices A, B, and C of the triangle ABC through the point X, and the intersections with each side are D, E, and F, each component of the barycentric coordinates G * of px is , Ga, gb, and gc in the figure are expressed by the equation (1). The coordinate value of each point and the length of each line segment in the figure can be calculated by a well-known analytical geometry method, but since both are elementary, detailed description is omitted. Then, the three intermediate control patterns Pi bar can be calculated by Equation (2) as Pd, Pe, and Pf in the figure. As a result, Px can be calculated as a linear combination of Pd, Pe, and Pf with ga, gb, and gc as weights.

  Here, as described above, the substance of each model control pattern Pa, Pb, Pc corresponding to the morphed coordinate points pa, pb, pc is a polygonal line pattern obtained by connecting the same number of handling points, and β Since it is equivalent to the set of coordinate values of the handling point hi on the α plane, intermediate control can be performed by substituting the coordinate values of the corresponding handling points into Pa, Pb, and Pc in equation (2) of FIG. A set of handling points of the patterns Pd, Pe, and Pf can be obtained, and further, a set of handling points of the synthesis control pattern Px can be obtained by substituting this into the equation (3). When these are connected to each other, a final synthesis control pattern Px is obtained. Then, on the composite control pattern Px, the value of the fogging possibility α corresponding to the currently detected in-vehicle humidity β (second type input variable) is read and output as a control value (S5).

  Next, as shown in FIG. 10, the partial input plane MPS (ξ-η plane) can be partitioned by redundant vertex unit cells DT having a larger number of vertices than the Delaunay triangle (simplex). By adopting the redundant vertex unit cell HCB having a larger number of vertices than that of the simplex, the number of model control patterns Pa, Pb, Pc, Pd involved in the creation of the composite control pattern Px is increased (redundancy: here 3 → 4) and the validity of the control content at the actual control coordinate point px according to the composite control pattern Px can be further increased.

  In this embodiment, the redundant vertex unit cell HCB is selected as a rectangular cell HCB having four vertices. If all of the vertices of the redundant vertex unit cell HCB, that is, the model coordinate points are set at random, there are two coordinate components per model coordinate point, so 2 × (the total number of vertices) ) Coordinate values must be considered as independent variables. However, when the rectangular cell HCB as described above is employed, if the length of each side of the rectangular cell HCB (M types) is given, from the coordinates of one model coordinate point forming the vertex of the rectangular cell HCB, The coordinates of model coordinate points can be determined automatically.

  As shown in FIG. 13, if the coordinates of the model coordinate point pa forming the vertex of the rectangle (rectangular cell) HCB closest to the origin of the ξ-η plane (partial input plane) is (ξa, ηa), the rectangular cell HCB With the side length in the ξ-axis direction of Δξ and the side length in the η-coordinate axis direction as Δη, the remaining three model coordinate points pb, pc, pd are pb: (ξa + Δξ, ηa), pc: (ξa, ηa + Δη), pc: (ξa + Δξ, ηa + Δη). As shown in FIG. 10, when the rectangular cells HCB forming the redundant vertex unit cells are all determined to be congruent (that is, the model coordinate points are arranged in a matrix at equal intervals in the ξ axis direction and the η axis direction, respectively). Δξ and Δη are constant, that is, constant. Therefore, in the morphing calculation, only the coordinate components ξa and ηa of one model coordinate point need be handled as independent variables, and only two independent variables ξ and η to be considered in the calculation are required. Significant simplification can be achieved.

  A specific control flow using this rectangular cell HCB (rectangular) is shown in the flowchart of FIG. First, as shown in FIG. 10, the rectangular cell HCB to which the actual control coordinate point px having the set of the acquired outside temperature ξ and inside temperature η as a coordinate component belongs is specified. Then, as shown in FIG. 11, four model coordinate points forming each vertex of the specified rectangular cell HCB are selected as morphed coordinate points pa, pb, pc, pd, and four model controls corresponding to these are selected. Patterns Pa, Pb, Pc, Pd are read from the control data memory 170 (S201), and up to the actual control coordinate point px of each morphed coordinate point pa, pb, pc, pd on the partial input plane MPS (ξ-η plane). The composite control pattern Px corresponding to the actual control coordinate point px is created by morphing with the weight according to the distance (S202). This calculation is performed by the morphing calculation unit 172 of FIG.

  FIG. 13 conceptually shows a control pattern polymorphing algorithm using a rectangular cell HCB. Two morphing coordinate points pa, pb, pc, pd are respectively A, B, C, D and pass through the actual control coordinate point px of the rectangular cell HCB and parallel to each side (CA, DB and CD, AB). Cut along the straight line. As a result, the rectangular cell HCB shares the actual control coordinate point X (px), and the four partial rectangles SCB that exclusively take one model coordinate point forming the vertex of the rectangular cell HCB, specifically, Is divided into rectangles CKXN (area: Sb), NXLD (area: Sa), KAMX (area: Sd), and KMBL (area: Sd).

Then, the relative area (relative volume) of each partial rectangle (partial rectangle) SCB to the rectangular cell HCB is the model coordinate point (that is, the model coordinate point included in the partial rectangle SCB on the opposite side in the diagonal direction of the rectangular cell HCB (that is, , Pa for pd, pb for pc, pd for pa, and pc for pb). That is, if the area of the rectangular cell HCB is S0, the synthesis control pattern Px is
Px = (1 / S0) × (Sa · Pa + Sb · Pb + Sc · Pc + Sd · Pd)
(13)
Can be synthesized.

  The algorithm for the morphing operation is actually quite equivalent to obtaining the synthesis control pattern Px by sequentially executing the following interpolation synthesis operation. That is, between the two model coordinate points adjacent to each other in the coordinate axis direction of the rectangular cell HCB, the orthogonal projection point of the actual control coordinate point px to the line segment extended by these model coordinate points is used as a branch point. A primary intermediate control pattern is synthesized based on the principle. Next, an orthographic projection point of the actual control coordinate point px is newly provided as a dividing point with respect to a line segment extending from the corresponding orthographic projection point with respect to the primary intermediate control pattern obtained for two opposing sides of each surface of the rectangular cell HCB. The primary intermediate control patterns are synthesized with respect to the minute points according to the principle of the lever to obtain the secondary intermediate control pattern. This series of processing is repeated until the minute point reaches the actual control coordinate point X. Regardless of which side of the rectangular cell HCB the interpolation calculation is started, the final results are all the same.

  FIG. 11 shows an example of the calculation. That is, if the orthogonal projection point of the actual control coordinate point px to the line segment DB is L and the orthogonal projection point of the actual control coordinate point px to the line segment CA is KL, the primary intermediate control pattern PL on the line segment DB side Is calculated by the equation (11) in the drawing, and the primary intermediate control pattern PK on the line segment CA side is calculated by the equation (12) in the drawing. Since the actual control coordinate point X exists on the line segment KL, when the secondary intermediate control pattern is obtained using the primary intermediate control patterns PL and PK using the actual control coordinate point X as a dividing point, the composite control pattern Px according to the equation (13) is obtained. Can be easily understood geometrically. The result of expressing Px using ξa and ηa is shown in equation (17).

The block diagram which shows an example of the electrical constitution of the air-conditioner control apparatus used as the application object of this invention. The block diagram which extracts and shows the principal part of the control system. The conceptual diagram which shows the content of the control data memory. The conceptual diagram which shows another example of the content of control data memory. The figure which shows an example of a model control pattern. The figure which shows the example of a setting of the model control pattern with respect to various model coordinate points. The figure which shows the 1st example of the division | segmentation method to the unit cell of a partial input plane. The conceptual diagram of the polymorphing using the unit cell of FIG. FIG. 7 is a diagram for geometrically explaining a polymorphing calculation algorithm using a unit cell of FIG. 6 in a control pattern given as a diagram pattern. The flowchart which shows the flow of the control processing using the polymorphing calculation algorithm of FIG. The figure which shows the 2nd example of the division | segmentation method to the unit cell of a partial input plane. The figure which geometrically explains the polymorphing calculation algorithm using the unit cell of FIG. 10 of the control pattern given as a diagram pattern. 11 is a flowchart showing the flow of control processing in the case of FIG.

Explanation of symbols

CA air conditioning controller (air conditioner controller)
β, ξ, η Essential input variable group ξ, η First type input variable β Second type input variable α Output variable MPS Partial input plane CPS Control pattern plane p Model coordinate point px Actual control coordinate point pa, pb, pc Morphed Coordinate point P Model control pattern Px Composite control pattern hi Handling point DT Unit cell (morphing target area, Delaunay triangle)
HCB rectangular cell (redundant vertex unit cell)
170 Air conditioner ECU
171 Morphing calculation unit (control pattern morphing means)
172 Control data memory (control characteristic information storage means)

Claims (11)

With reference to the essential input variable group including the window glass temperature ξ, the vehicle interior temperature η and the vehicle interior humidity β reflecting the surface temperature on the fog generation side of the vehicle window glass, an output variable α indicating the possibility of fog generation on the vehicle window glass Is a method of performing an operation control of the fogging suppression mechanism of the window glass based on the obtained output variable value α,
The essential input variable group is a partial input plane over which the first type input variables ξ and η are stretched with the window glass temperature ξ and the vehicle interior temperature η as a first type input variable and the vehicle humidity β as a second type input variable. A plurality of discrete model control patterns that define the relationship between the value of the two-type input variable β and the value of the output variable α are prepared for each of the predetermined Q (Q ≧ 4) model coordinate points. ,
When input values of the essential input variable groups ξ, η, β are given, the coordinate points on the partial input plane of the first type input variables ξ, η included in the input values are set as actual control coordinate points. , Specifying J (Q> J ≧ 3) or more model coordinate points existing in a predetermined morphing target area including the actual control coordinate point in the partial input plane as morphed coordinate points;
In the control pattern plane spanned by the second type input variable β and the output variable α, the shape of J model control patterns corresponding to each morphed coordinate point is represented by each morphed coordinate point in the partial input plane. By creating a composite control pattern corresponding to the actual control coordinate point by morphing with a weight according to the distance to the actual control coordinate point,
2. A fog suppression mechanism control method, comprising: calculating the output variable value α indicating the fog occurrence possibility corresponding to the input values of the essential input variable groups ξ, η, and β based on the composite control pattern.   The model control pattern and the composite control pattern are the vehicle interior humidity β on the control pattern plane where the vehicle interior humidity β forming the second type input variable and the fog generation possibility α forming the output variable are stretched. Has a pattern profile in which the fogging probability α increases in a step-like manner from a low humidity value section where the value is less than a predetermined critical humidity value to a high humidity value section exceeding the critical humidity value. 2. The fog suppression mechanism control method according to claim 1, which is defined as a two-dimensional diagram pattern.   3. The fog suppression mechanism control method according to claim 2, wherein each of the model control patterns is defined such that the critical humidity value decreases as the window glass temperature ξ decreases and as the interior temperature η increases. The two-dimensional diagram pattern is defined by a certain number of handling points arranged from the pattern start point to the pattern end point, and each handling point of the two-dimensional diagram pattern corresponding to all the model coordinate points Are uniquely associated with each other according to the sequence order,
A composite handling point is generated by morphing corresponding ones of the handling points of the two-dimensional diagram pattern applied to each of the morphing coordinate points, and a two-dimensional diagram forming the composite control pattern by the composite handling points 4. The fog suppression mechanism control method according to claim 2, wherein the pattern is defined.   5. The fog suppression mechanism control method according to claim 4, wherein the two-dimensional diagram pattern is a broken line pattern obtained by sequentially connecting the handling points in a straight line. A plurality of unit cells are arrayed so as to partition the partial input plane without gaps by connecting the model coordinate points adjacent to each other in the partial input plane to each other by a frame. Being
6. The unit cell including the actual control coordinate point among the plurality of unit cells is used as the morphing target region, and a model coordinate point forming a vertex of the unit cell is used as the morphed coordinate point. The fog suppression mechanism control method according to any one of the above.   The fog control mechanism control method according to claim 6, wherein the unit cell is a Delaunay triangle having each model coordinate point as a vertex.   8. The fog suppression mechanism control method according to claim 7, wherein the unit cell is a rectangular cell in which each coordinate axis and each side extending the partial input plane are defined in parallel.   The fog suppression mechanism control method according to claim 8, wherein the plurality of rectangular cells are determined to be congruent with each other.   By cutting the rectangular cell through a plane parallel to each side through the actual control coordinate point, each of the model control points that share the actual control coordinate point and form the vertex of the rectangular cell are exclusive. Each of the partial rectangles is divided into partial rectangles, and the relative area of each partial rectangle with respect to the rectangular cell is expressed by the weight of the model coordinate point included in the partial rectangle and the model coordinate point located on the opposite side of the rectangular cell in the diagonal direction. The defogging mechanism control method according to claim 8 or 9, wherein the morphing is performed in the form of: With reference to the essential input variable group including the window glass temperature ξ, the vehicle interior temperature η and the vehicle interior humidity β reflecting the surface temperature on the fog generation side of the vehicle window glass, an output variable α indicating the possibility of fog generation on the vehicle window glass Is a device that controls the operation of the fogging suppression mechanism of the window glass based on the obtained output variable value α,
The essential input variable group is a partial input plane over which the first type input variables ξ and η are stretched with the window glass temperature ξ and the vehicle interior temperature η as a first type input variable and the vehicle humidity β as a second type input variable. A plurality of model control patterns for determining the relationship between the value of the two kinds of input variables β and the value of the output variable α, which are discretely prepared for each of the above-mentioned predetermined Q (Q ≧ 4) model coordinate points Control characteristic information storage means for storing
When input values of the essential input variable groups ξ, η, β are given, the coordinate points on the partial input plane of the first type input variables ξ, η included in the input values are set as actual control coordinate points. Morphing to specify, as the morphing coordinate points, J (Q> J ≧ 3) or more model coordinate points existing in a predetermined morphing target area including the actual control coordinate points inside the partial input plane Coordinate point specifying means;
In the control pattern plane spanned by the second type input variable β and the output variable α, the shape of J model control patterns corresponding to each morphed coordinate point is represented by each morphed coordinate point in the partial input plane. Control pattern morphing means for performing a composite control pattern corresponding to the actual control coordinate point by morphing with a weight according to the distance to the actual control coordinate point;
Output variable calculation means for calculating the output variable value α indicating the degree of occurrence of fogging corresponding to the input values of the essential input variable groups ξ, η, β based on the composite control pattern;
An anti-fogging mechanism control device comprising:

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